Core-making machine.



W. H. FORD.

CORE MAKING MACHINE.

APPLICATION FILED SEPT. 16. 19:3.

Patented Mar. 14,

@067 Mm)? i/fljai d 2 THE COLUMBIA PLANDGRAPH c0. WASHINGTON, D. c.

WILLIAM H. FORD, OF LOWELL, MASSACHUSETTS, ASSIGNOR OF- ONE-HALF T FRANK -TEI) STATES PATENT HANGHETT, 0F LOWELL, MASSACHUSETTS.

CORE-MAKING MACHINE.

Specification of Letters Patent. i Patented Mar, 14, 1916.

Application filed September 16, 1913. Serial No. 790,017.

. tion, like letters onthe drawings representing like parts.

My present invention is a core making machine for use particularly in the manufacture of jewelry, where a specially strong,

.accurate and adjustable machine is nec-' essary.

The object of the invention is to provide a core making machine which will have provision for making cores of any size, depth,

thickness or contour and which will be readily adjustable for such cores of varying form and thickness, and furthermore to produce. a machine which will have mechanism to remove, quickly, a core when made and to be ready for a successive core, thus greatly expediting this operation.

To this end I form a machine having a core holder which may be interchanged at uill and which, also may be quickly adjusted with great exactness and when so adjusted may be locked in positlon to determine the depth and extent of the core to be made. In my inventions for making rings by casting the seal, signet, emblem,

' monogram, or the like, which heretofore would be engraved, or for casting the-ring with a bezel of any size'or form, it is necessary to make suchc'ores with great delicacy and exactness and the machine illustrated herein is intended primarily for use in making such cores, although it is not, of course, limited to such use.

Other features of the invention, novel combination. of parts, and details of construction, will be hereinafter more fully pointed out and claimed.

In the drawings, Figure 1 illustrates a preferred embodiment of the invention with a portion of the base broken away, Fig. 2

.; is a view partly in section, at right angles to that shown in Fig. 1, Fig. 3 is a plan view; Fig. 4: is a detail cross sectional view showing the die molding material when the core is completedbefore being removed; and

Fig. 5 is a plan view of the die support.

It will be readily understood that a core making machine must be. of comparatively heavy and rigid workmanship in order properly to withstand the operations of pounding, hammering, and forcing the mold material into the core cavity and upon the die plate, if one is used, to reproduce the delicate impression thereof, especially when such die. plate carries engraved insignia. My machine is made preferably of metal, and comprises a base 1 and a column 2 supported on said base and secured thereto in any suitable manner, as by screws 3 and 1. The column 2 is bored centrally, as indicated at 5 and is formed with an open recess 6, which recess is closed by the base plate 1. The upper portion of the column 2 is reduced in diameter at 7 and is threaded to receive the correspondingly threaded portion 8 of an upper and adjustable column 9 (see Fig. 2) which member 9 is also bored axially asindicated at 10. On the reduced portion 7 of the column 2 is threaded a clamping nut 11, which acts to lock the upper column 9 in its position on the column 2, so as to secure these two columns in any relative position desired. This arrangement permits an adjustment for height to be made, and consequently depth of the core, as will be explained. The upper portion of the column 9 is threaded as indicated at 12, to carry a core box. 13 having cooperating threads to fit on said threaded portion 12 and a shoulder 14 to enable the core box 13 to be firmly and rigidly fitted on top of the column 9, as well as to relieve the threads 12 from strain in forcing the mold material into the core box.

The interior 15 of the core box 13 may be of any. desired form, such as round, -oval, octagonal, etc., to fit the work in hand, and a plurality of core boxes 13 having such vary: ing diameters, and all adapted to fit on the threads 12 of the machine, will ordinarily be kept on hand and intended to be interchanged as the requirements of the particular work in hand may demand. In the interior of thecore box is a plateor support 16 of similar contour and' size for the particular core box to be used therewith. This support or plate 16 is mounted on a rod 17, j which extends through the bores 10 and 5 of the supporting columns 9-and 2 into the open space 6 in the base of the machine. In this space the end of the rod 17 rests upon a cam 18,.which is supported rigidlyon 2L shaft 19 extending'through suitable bearings 20' and 21 at diametrically opposite points .in.

the base 2. g 7

one end portion of the shaft 19 is grooved at 22 to receive a locking nut 28 to hold the shaft in position with-thecam 18 directly under the axial bore 5 and therefore under the rod 17. To one end of the shaft 19 is affixed a handle 24. The cam 18 is formed with a straight cam surface 25 anda curved cam face .26, so that as the handle 24 isactuated and the shaft 19 rotated, the cam face.-

26 will raise or lower the rod 17 .With the straight cam face 25 in position vunderthe end of the rod 17 however, a straight firm support is supplied to the shaft 17, and consequently to the plate 16 in the core box 13. The cam 18 is so proportioned that the rod 17 is at its lowermost limit of movement, and hence the plate 16 at its lowermost posi-. tion in the core box 13,:when the straight face 25 is in contact with said rod 17, and

when the handle 24 is turned and the curved face 26 of the cam is forced against the rod 17, the rod will be raised'toforce the plate 16 upwardly to a position substantially flush with the 'top of the core box 13 so that the 5 core may be readily removed by hand. With the straight face of the cam 25 in-contact with the rod 17, said rod and plate 16 will give a solid support to receive the mold material 27, and the core is formed. The provision for relative adjustment as to height of the column 9 to the column. 2 enables me to secure a quick adjustment for the depthof the core27,.being made in the core box 13, the two columns 9 and 2 being locked when in desired position by the nut 11. Where a change is desired to be made' from oval cores, for example, to square round oroctagonal formed cores,'one core box 13 is removed, the plate 16 and its rod 17, preferably integral therewith, isalso removed and a corresponding plate 16 and core box 18 for making a square core is positioned'and the core making operation wlll proceed as before. When the core is completed, the

operator actuates the handle 24 to raise the completed core above the level of the top of the core box and remove it. A return of the handle 24 to former position is all that is necessary to have'the machine ready for making successive cores. 7

Where it is desired to make a core with an insignia, a die plate 28 is employed, which will be ofcorrespondinggcontour to fit the particular interior 15 of thecore box 13 being used, similar to the contjour of the plate 16 and thejicolu'mns 9 and 2 may "beadjusted relative to each other, so as to pre-- vent the die plate 28 being raised above the operation of the machine with a die plate thereonis similar to that already described "level of the top of the core box 12, when the corefis lifted, so that said die plate will not be'accidentally removed with a core. The r when making a plain core. ii In; order to facilitate the adjustment of the columns 2 and 9 relatively to each other, to provide for the extent of the core 27 being made, I pre-' fer to have the lock nut 11 carry a scale 29, V which with a fixed mark or guide 30 on the} column 2- will enable the" operator-to determine the height of-the core'cavity 15, whenthe machine is locked in position and ready for use. j 1

'The advantages'of my improved machine will be readily appreciated, enabling cores to" be'made with great exactness and uni-- formity and themachine is particularly advantageous in carrying out the invention of my saidcopending application. Y I- Having described 'my invention, what I claim as new and desire to secure by Letters Patent is: 1. A coremakingmachine, comprising a supporting standard in the form of a column having its upper portion exteriorly threaded, a core box threaded on to'said column and means to hold the same in adjusted position, in combination witha movable die plate carried in said core box, and means to eject sald d1e plate therefrom. V V 2. A core making machine, comprlsmg a supporting standard in: the form of a: col- V umn having its upper portion exteriorly f threaded, a core box threaded onto said 001- V umn and means to hold the same in adjusted position, in combination with a die plate *movably supported in said core'box, and means carried by said base to eject the die plate therefrom.

supporting standard in the form of a column having its upper portion exteriorly threaded, a core box threaded onto said 'column and means to hold the same in adjusted position, and a movabledie'plate held-bya support from the base, whereby adjustment of the core box on thebase regulates the depth of the core box. I

. v 4. A core making machine, comprising a supporting base and standard in the form of a column having itsupper portion exteriorly threaded, a core box, a core box support threaded on' to said column andmeans tohold the same in adjusted position, both In testimony whereof, I have signed my said base and said support being centrally name to this specification, in the presence of bored to receive a rod, a die plate fitting in two subscribing Witnesses.

said core box and carried by said rod, and WILLIAM H. FORD. means in the base to support said rod and Witnesses:

move the same Vertically to eject the die JAMES R. HODDER,

plate. FRANK HANCHETT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

